Chainless gearing for cycles.



No. 673,439. Patented May 7, l90l.

J. MARZION.

CHAINLESS GEABING FOR CYCLES,

(Application filed Mar. 20, 1900.) (No Model.) 2 Shaets-Sheet I IN VEN 708$,

MITNESSES 64 g 0 A 7TORNEYS- No. 673,439. Patented May 7, l90l. J. MABZION.

CHAINLESS GEARING FOR CYCLES.

(Application filed Mar. 20, 1900 I 2 Shoota$heat 2 (No Model.)

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IA! VEMTORS.

WITNESSES:

Xx m AITomvErs- UNITED STATES PATENT OFFICE.

JOSEF MARZION, OF MOOKER, GERMANY.

CHAINLESS GEARING FOR CYCLES.

SPECIFICATION formingpart of Letters Patent No. 673,439, dated May '7, 1901.

Application filed March 20, 1900. Serial No. 9,446. (N 0 model.)

To aZZ whom it may concern.-

Be it known that I, JOSEF MARZION, innkeeper, of Mocker, Upper Silesia, in the German Empire,haveinvented some new and useful Improvements in and Relating to Chainless Gearing for Cycles, of which the following is a full and clear description.

This invention relates to a type of chainless gearing for use with bicycles, tricycles, and the like; and its object is to so construct and arrange such gearing that it possesses no dead-points. A form of gearing actuated by two vertically reciprocating pedals and to which these improvements are applicable is illustrated in the accompanying drawings, to which I will hereinafter refer.

Figure 1 shows in elevation a bicycle to which the improved gearingis attached. Fig. 2 shows in plan part of the driving-wheel of the same machine. Figs. 3, 4:, 5, 6, and 7 represent the driving mechanism and details of the driving mechanism upon an enlarged scale.

As will be seen, the driving-wheel of the machine is driven from or by the verticallyreciprocating levers a b, the ends of which are provided with suitable pedals. The pedals are connected together by the cord, chain, or the like 0, which passes over a suitable pulley in such a manner as to insure that one pedal is rising when the other is falling. The inner ends or hubs of the levers a b are formed into cases or boxes d, which contain a suitable number of spring-controlled de tents or ratchets e, capable of moving within grooves or recesses p. The hubs d encircle the two toothed wheels g, which are fixed to the axle f, and this axle also has secured to it a toothed wheel h, which gears with a pinion 2', mounted upon the frame of the machine. Fixed to the pinion 'i is a second wheel 70, which gears with a pinion Z, secured to the hub of the machine-wheel. The levers a b are alternately pressed up and down to drive the machine, each lever being effective when moving in one direction. When the hub 61 of a lever moves in the direction shown by the arrow in Fig. 3, the wheel g is driven forward. When it rotates in the direction shown by the arrow in Fig. 4:, it slips backward, and the wheel g and axle fare driven forward by the other lever. The pawls e within a hub d are shaped as shown and are controlled by springs '12, whose normal tendency is to force them inward against the teeth of the wheel g. A greater number of pawls or detents e are employed than there are teeth in the wheel g.

Referring to the driving device on one side of the machine only and the hub d being rotated with the arrow, Fig. 3, one of the teeth 6 engages with its front face against the correspondingly-shaped face of one of the teeth upon the wheel g. The detent is thereby forced backward, as indicated by the dotted arrow, Fig. 3, so that a coned or wedgeshaped part on its back face is forced into and firmly held in a correspondingly-shaped recess 0, formed in-the channel 19. The detentis thus prevented from rising in its groove or channel and the wheel g is carried forward. lVhen the hub 61 is revolved by the upward movement of the leverin the opposite direction, as indicated by the arrow in Fig. 4, the detent e is moved in the direction of the dotted arrow by the curved surface q of the tooth upon the wheel until the front face 0" of the detent comes against the contiguous face of the channel 19. The pawl e is now free to move upward and allow the passage underneath it of the tooth of the wheel g.

Owing to the greater number of detents employed than there are teeth in the wheel, it is insured that detents at opposite ends of a diameter of the hub d are always in similar engagement with the teeth.

8 indicates a curved guide-rail with which the pedal or the end of the lever a or b may be engaged by rollers, bowls, or the like.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is- In a drive mechanism for bicycles, the combination with the rear wheel and axle thereof and gearing interposed between the axle and hub of toothed wheels fixed to the axle, one pressing said detents inwardly, substantially wall of each tooth of said Wheels extending as described. to at a sharp angle and the other well at a slight In witness whereof I have hereunto set my angle and rounded, the pedal-levers having hand in presence of Two witnesses.

5 hubs, detents guided in the hubs havingl JOSEF MARZION.

wedge portions, (mrresponding, wedge por- Witnesses: tions in the hub eoaeting with the wedge por- CLARA D. FROHBACH, tions of the detent and springs for normally ANNA S. BllSING. 

